A major hybrid automobile and truck innovator just after the turn of the 20th Century, Mercedes-Benz has engineered advanced versions of the concept that are not only highly economical, but also have a big “Wow” factor.
The valve end of the roller rocker is moving in an arc and the valve is moving in a straight line, which means that the roller is going to move across the top of the valve to some small degree no matter what you do.
When a customer comes to your shop with a possible charging system problem, the inspection should involve more than just checking the voltage across the battery terminals with the engine running.